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Inverse trigonometric function

inverse function of the trigonometric function

Pronunciation
/ˈɪnvərs ˌtrɪɡənəˈmɛtrɪk ˈfəŋkʃən/
/ˈɪnvəːs ˌtrɪɡənəˈmɛtrɪk ˈfʌŋkʃən/